七年级数学上册一元一次方程专项练习题50.docx

1、七年级数学上册一元一次方程专项练习题505 x 1 x 0.3x0.80.22.8x3 6 3 4 1 7x6x 2(x7)5(x4)109 2 1 1 (9x1)x9 5x3(5x)47 5 y3 y3 4 3x8(x7)50 2 6 1 2 (13x)(5x4) 2(4x6)133 9 5 x 1 x 0.6x0.89.36.2x3 6 9 8 1 4x2x 6(x9)3(x5)133 6 1 2 (4x7)x7 6x2(15x)56 5 y2 y3 2 1x4.5(x6)45 4 5 1 2 (32x)(4x4) 2(6x7)113 7 5 x 1 x 0.4x0.336.3x3 2 3

2、 8 1 8x5x 4(x2)4(x7)47 2 1 4 (3x1)x3 3x5(17x)69 5 y3 y1 6 3.5x0.5(x1)30 2 6 1 2 (13x)(2x1) 6(5x9)164 9 7 x 1 x 0.8x0.78.51.1x9 4 6 4 1 8x9x 9(x3)3(x7)115 5 1 1 (6x9)x9 2x9(15x)34 5 y3 y3 6 1.5x4.5(x6)50 3 5 1 2 (22x)(5x4) 5(3x1)146 5 7 x 1 x 0.3x0.90.49.8x9 4 6 8 1 7x4x 5(x4)4(x7)99 4 1 4 (6x3)x6 2x

3、6(2x)62 5 y1 y1 7 5x7(x2)5 4 5 1 2 (54x)(4x3) 2(3x7)174 7 7 x 1 x 0.9x0.42.45.4x6 2 9 4 1 3x4x 6(x5)9(x5)33 8 1 3 (5x1)x1 3x4(14x)43 5 y2 y2 4 4x10(x9)25 2 6 1 2 (54x)(3x1) 5(5x4)95 3 5 x 1 x 0.5x0.60.59.3x6 8 9 8 1 2x4x 2(x3)6(x6)147 4 1 1 (6x1)x5 3x4(12x)58 5 y1 y1 3 2.5x7.5(x6)10 4 5 1 2 (14x)(2x

4、5) 9(6x8)45 7 7 x 1 x 0.8x0.92.43.2x9 4 6 8 1 3x8x 6(x4)2(x8)207 8 1 1 (6x7)x4 7x5(5x)65 5 y1 y2 4 4.5x4(x7)30 4 5 1 2 (12x)(3x5) 7(6x9)108 7 5 x 1 x 0.6x0.227.5x9 8 6 4 1 7x6x 6(x4)8(x7)199 2 1 1 (7x8)x7 9x6(11x)62 5 y3 y2 7 3x5.5(x5)20 2 5 1 2 (14x)(3x1) 4(8x5)185 9 7 x 1 x 0.6x0.975.9x3 4 3 8 1 2x3x 5(x6)9(x9)77 7 1 1 (6x7)x1 2x4(4x)34 5 y2 y2 4 4x1.5(x9)15 4 5 1 2 (12x)(3x4) 6(2x2)88 3